ABSTRACT
Standard broadcasting refers to the transmission of voice and music received by the general public in the 535-1705 kHz frequency band. Amplitude modulation is used to provide service ranging from that needed for small communities to higher powered broadcast stations needed for larger regional areas. The primary service area is defined as the area in which the ground or surface-wave signal is not subject to objectionable interference or objectionable fading. The secondary service area refers to an area serviced by skywaves and not subject to objectionable interference. Intermittent service area refers to an area receiving service from either a surface wave or a skywave but beyond the primary service area and subject to some interference and fading.
